Tennessee Bureau of Investigation agents are gathering evidence in an officer involved shooting in Fairview that left a knife-wielding suicidal man dead inside his apartment Friday night, authorities said.

District Attorney Kim Helper, who oversees the 21st Judicial District, will decide whether two officers who shot Chase Sullivan, 36, were justified.

A neighbor concerned that Sullivan was suicidal called police to an apartment complex on the 1000 block of Highway 100 around 8:30 p.m.

Sullivan was inside his locked apartment when officers, firefighters and medics arrived. He refused to open the door, but authorities otherwise "gained entry" and Sullivan confronted them with a knife, TBI officials said.

"The officers gave several commands for Sullivan to drop the weapon, which Sullivan ignored," TBI said in a written statement. "The situation escalated further and resulted in two officers firing their service weapons several times, striking Sullivan. Though first responders administered CPR immediately, Sullivan died on the scene."

Witness interviews and other evidence gathered by TBI agents will be presented to the District Attorney General's office.

Anyone with information about this incident is asked to call 1-800-TBI-FIND.